[Question] <Inquire about matters pertaining to the Metrics plugin>

### Question

使用[官方文档](https://shenyu.apache.org/zh/docs/plugin-center/observability/metrics-plugin)中提供的dashboards面板json配置导入grafana后发现监控界面中除grabage collector metrics监控指标有数据之外其他指标都为空，但是Prometheus中可以查到相关的指标数据。且文档编写的有不准确的地方，例如：文档提供的Prometheus相关配置中job_name为Apache ShenYu，但是相关的Grafana界面效果截图中job名却为shenyu，数据源为大写的Prometheus。

Start with the Metrics plugin documentation and the imported Grafana dashboard JSON; compare their datasource and job settings with the metric labels visible in Prometheus. Reproduce the dashboard import and investigate why only garbage-collector panels populate. Done means the documented configuration and dashboard consistently display the available metrics with aligned job and datasource names.

Written by the indexing model from the issue text.